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Win32.Expiro.23

Added to the Dr.Web virus database: 2011-09-19

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\RSVP] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\RDSessMgr] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\NetDDE] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\WmiApSrv] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\VSS] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\TlntSvr] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\MSIServer] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\COMSysApp] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\ClipSrv] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\CiSvc] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\mnmsrvc] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\ImapiService] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\dmadmin] 'Start' = '00000002'
Infects the following executable system files:
  • <SYSTEM32>\wbem\wmiapsrv.exe
  • <SYSTEM32>\magnify.exe
  • <SYSTEM32>\narrator.exe
  • <SYSTEM32>\tlntsvr.exe
  • <SYSTEM32>\ups.exe
  • <SYSTEM32>\vssvc.exe
  • <SYSTEM32>\osk.exe
  • <SYSTEM32>\mobsync.exe
  • <SYSTEM32>\tourstart.exe
  • <SYSTEM32>\rcimlby.exe
  • <SYSTEM32>\utilman.exe
  • <SYSTEM32>\cmd.exe
  • <SYSTEM32>\notepad.exe
  • <SYSTEM32>\smlogsvc.exe
  • <SYSTEM32>\dmadmin.exe
  • <SYSTEM32>\imapi.exe
  • <SYSTEM32>\mnmsrvc.exe
  • <SYSTEM32>\cisvc.exe
  • <SYSTEM32>\clipsrv.exe
  • <SYSTEM32>\dllhost.exe
  • <SYSTEM32>\msdtc.exe
  • <SYSTEM32>\locator.exe
  • <SYSTEM32>\rsvp.exe
  • <SYSTEM32>\scardsvr.exe
  • <SYSTEM32>\msiexec.exe
  • <SYSTEM32>\netdde.exe
  • <SYSTEM32>\sessmgr.exe
Malicious functions:
Executes the following:
  • <SYSTEM32>\msiexec.exe /V
  • <SYSTEM32>\sessmgr.exe
  • <SYSTEM32>\dmadmin.exe /com
  • <SYSTEM32>\cisvc.exe
  • <SYSTEM32>\dllhost.exe /Processid:{02D4B3F1-FD88-11D1-960D-00805FC79235}
Modifies settings of Windows Internet Explorer:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '2103' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1406' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2] '1609' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1609' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4] '1609' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4] '2103' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4] '1406' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2] '2103' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0] '1609' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0] '2103' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0] '1406' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1] '1406' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2] '1406' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1] '1609' = '00000000'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1] '2103' = '00000000'
Modifies file system :
Creates the following files:
  • <SYSTEM32>\cmd.vir
  • %PROGRAM_FILES%\Outlook Express\wab.vir
  • <SYSTEM32>\notepad.vir
  • %PROGRAM_FILES%\Windows Media Player\wmplayer.vir
  • <SYSTEM32>\utilman.vir
  • <SYSTEM32>\magnify.vir
  • <SYSTEM32>\wbem\wmiapsrv.vir
  • <SYSTEM32>\osk.vir
  • <SYSTEM32>\narrator.vir
  • %APPDATA%\Mozilla\Firefox\Profiles\przhlnon.default\extensions\{ec9032c7-c20a-464f-7b0e-13a3a9e97385}\install.rdf
  • %APPDATA%\Mozilla\Firefox\Profiles\przhlnon.default\extensions\{ec9032c7-c20a-464f-7b0e-13a3a9e97385}\chrome.manifest
  • %APPDATA%\Mozilla\Firefox\Profiles\przhlnon.default\extensions\{ec9032c7-c20a-464f-7b0e-13a3a9e97385}\components\red.js
  • %APPDATA%\Mozilla\Firefox\Profiles\przhlnon.default\extensions\{ec9032c7-c20a-464f-7b0e-13a3a9e97385}\chrome\content.jar
  • <LS_APPDATA>\wsr19zt32.dll
  • <SYSTEM32>\tourstart.vir
  • <SYSTEM32>\mobsync.vir
  • <SYSTEM32>\rcimlby.vir
  • %PROGRAM_FILES%\Outlook Express\msimn.vir
  • <SYSTEM32>\mnmsrvc.vir
  • <SYSTEM32>\imapi.vir
  • <SYSTEM32>\msiexec.vir
  • <SYSTEM32>\msdtc.vir
  • %WINDIR%\Registration\{02D4B3F1-FD88-11D1-960D-00805FC79235}.{B1DA1097-D393-4ED6-A542-0AE75E7CD24A}.crmlog
  • <SYSTEM32>\clipsrv.vir
  • <SYSTEM32>\cisvc.vir
  • <SYSTEM32>\dmadmin.vir
  • <SYSTEM32>\dllhost.vir
  • <SYSTEM32>\tlntsvr.vir
  • <SYSTEM32>\smlogsvc.vir
  • <SYSTEM32>\vssvc.vir
  • <SYSTEM32>\ups.vir
  • <SYSTEM32>\scardsvr.vir
  • <SYSTEM32>\sessmgr.vir
  • <SYSTEM32>\netdde.vir
  • <SYSTEM32>\rsvp.vir
  • <SYSTEM32>\locator.vir
Deletes the following files:
  • <SYSTEM32>\narrator.vir
  • <SYSTEM32>\osk.vir
  • <SYSTEM32>\utilman.vir
  • <SYSTEM32>\magnify.vir
  • <SYSTEM32>\ups.vir
  • <SYSTEM32>\vssvc.vir
  • <SYSTEM32>\wbem\wmiapsrv.vir
  • %PROGRAM_FILES%\Outlook Express\wab.vir
  • <SYSTEM32>\tourstart.vir
  • %PROGRAM_FILES%\Outlook Express\msimn.vir
  • <SYSTEM32>\rcimlby.vir
  • <SYSTEM32>\mobsync.vir
  • <SYSTEM32>\cmd.vir
  • %PROGRAM_FILES%\Windows Media Player\wmplayer.vir
  • <SYSTEM32>\notepad.vir
  • <SYSTEM32>\tlntsvr.vir
  • %WINDIR%\Registration\{02D4B3F1-FD88-11D1-960D-00805FC79235}.{E58DFEED-FD87-424D-B178-3D81F95917DF}.crmlog
  • <SYSTEM32>\imapi.vir
  • <SYSTEM32>\mnmsrvc.vir
  • <SYSTEM32>\dmadmin.vir
  • <SYSTEM32>\cisvc.vir
  • <SYSTEM32>\clipsrv.vir
  • <SYSTEM32>\dllhost.vir
  • <SYSTEM32>\msdtc.vir
  • <SYSTEM32>\rsvp.vir
  • <SYSTEM32>\scardsvr.vir
  • <SYSTEM32>\smlogsvc.vir
  • <SYSTEM32>\locator.vir
  • <SYSTEM32>\msiexec.vir
  • <SYSTEM32>\netdde.vir
  • <SYSTEM32>\sessmgr.vir
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''
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